<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>03_列表的过滤</title>
    <!-- 引入Vue -->
    <script type="text/javascript" src="../js/vue.js"></script>

</head>
<body>

    <!-- 准备好一个容器 -->
    <div id="root">
        <!-- 遍历数组 -->
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyword">
        <ul>
            <li v-for="(person,index) in filPersons" :key="person.id">
                {{person.name}} - {{person.age}} - {{person.sex}}
            </li>
        </ul>

       
    </div>

</body>
    <script type="text/javascript">
        //用watch实现
        // new Vue({
        //     el:'#root',
        //     data:{
        //         keyword:'',
        //         persons:[
        //             {id:'001',name:'马冬梅',age:19, sex:'女'},
        //             {id:'002',name:'周冬雨',age:20, sex:'女'},
        //             {id:'003',name:'周杰伦',age:21, sex:'男'},
        //             {id:'004',name:'温兆伦',age:22, sex:'男'}
        //         ],  
        //         filPersons:[],  
        //     },
        //     watch:{
        //         keyword:{
        //             immediate: true,
        //             handler(newVal){
        //                 this.filPersons = this.persons.filter((p) => {
        //                     return p.name.indexOf(newVal) !== -1
        //                 })
        //             }
        //         }
        //     }
        // })       


        //用计算属性实现
        new Vue({
            el:'#root',
            data:{
                keyword:'',
                persons:[
                    {id:'001',name:'马冬梅',age:19, sex:'女'},
                    {id:'002',name:'周冬雨',age:20, sex:'女'},
                    {id:'003',name:'周杰伦',age:21, sex:'男'},
                    {id:'004',name:'温兆伦',age:22, sex:'男'}
                ],  
            },
            computed:{
                filPersons(){
                    return this.persons.filter((p) => {
                        return p.name.indexOf(this.keyword) !== -1
                    })
                }
            }
        })  

    </script>

</html>